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<?php declare(strict_types=1); |
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/** |
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* It's free open-source software released under the MIT License. |
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* |
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* @author Anatoly Nekhay <[email protected]> |
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* @copyright Copyright (c) 2018, Anatoly Nekhay |
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* @license https://github.com/sunrise-php/http-message/blob/master/LICENSE |
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* @link https://github.com/sunrise-php/http-message |
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*/ |
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namespace Sunrise\Http\Message\Header; |
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/** |
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* Import classes |
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*/ |
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use Sunrise\Http\Message\Exception\InvalidHeaderValueParameterException; |
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use Sunrise\Http\Message\Header; |
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/** |
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* Import functions |
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*/ |
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use function implode; |
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use function sprintf; |
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/** |
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* @link https://www.w3.org/TR/CSP3/#csp-header |
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*/ |
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class ContentSecurityPolicyHeader extends Header |
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{ |
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/** |
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* Regular Expression for a directive name validation |
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* |
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* @link https://www.w3.org/TR/CSP3/#framework-directives |
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* |
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* @var string |
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*/ |
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public const VALID_DIRECTIVE_NAME = '/^[0-9A-Za-z\-]+$/'; |
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/** |
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* Regular Expression for a directive value validation |
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* |
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* @link https://www.w3.org/TR/CSP3/#framework-directives |
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* |
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* @var string |
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*/ |
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public const VALID_DIRECTIVE_VALUE = '/^[\x09\x20-\x2B\x2D-\x3A\x3C-\x7E]*$/'; |
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/** |
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* @var array<string, string> |
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*/ |
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private array $parameters; |
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/** |
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* Constructor of the class |
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* |
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* @param array<array-key, mixed> $parameters |
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* |
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* @throws InvalidHeaderValueParameterException |
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* If the parameters aren't valid. |
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*/ |
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public function __construct(array $parameters = []) |
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{ |
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$parameters = $this->validateParametersByRegex( |
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$parameters, |
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self::VALID_DIRECTIVE_NAME, |
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self::VALID_DIRECTIVE_VALUE |
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); |
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$this->parameters = $parameters; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function getFieldName(): string |
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{ |
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return 'Content-Security-Policy'; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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14 |
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public function getFieldValue(): string |
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{ |
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$directives = []; |
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foreach ($this->parameters as $directive => $value) { |
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// the directive can be without value... |
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// e.g. sandbox, upgrade-insecure-requests, etc. |
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if ($value === '') { |
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4 |
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$directives[] = $directive; |
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4 |
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continue; |
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} |
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$directives[] = sprintf('%s %s', $directive, $value); |
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} |
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return implode('; ', $directives); |
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} |
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} |
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sunrise-php /
http-message
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